Unlock instant, AI-driven research and patent intelligence for your innovation.

Lithium titanate battery and manufacturing method thereof

A technology of lithium titanate battery and manufacturing method, which is applied in the manufacture of electrolyte batteries, battery electrodes, secondary batteries, etc., can solve the problems of low initial charge and discharge efficiency, easy lithium analysis, etc., and achieve good electrochemical stability and safety High, high stability effect

Active Publication Date: 2016-08-17
NINGBO VEKEN BATTERY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high energy density irregular ternary- Lithium titanate lithium ion battery

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A manufacturing method of a lithium titanate battery, the manufacturing method comprising the following steps:

[0031] a) Making positive and negative electrodes: First, make polytetrafluoroethylene (PVDF) into a solution with a mass fraction of 8% with N-methylpyrrolidone (NMP), then add a conductive agent, and disperse it at high speed for 2 hours. MaterialLiNi 0.33 co 0.33 mn 0.33 o 2 +LiNi 0.3 co 0.35 mn 0.35 o 2 Disperse in an organic solvent, stir evenly to obtain negative electrode slurry, disperse at high speed for 2 hours, add NMP to adjust the viscosity to 1000 mPa s, and sieve the negative electrode slurry with a 120-mesh metal mesh after high-speed shear dispersion for 1 hour, Evenly coat the sieved negative electrode slurry on an aluminum foil with a thickness of 20 microns, dry it at 110°C, and roll the dried negative electrode sheet. The thickness of the negative electrode sheet after rolling is 100 μm, and the compacted density is 3.0g / cm 3 ; ...

Embodiment 2

[0038] A manufacturing method of a lithium titanate battery, the manufacturing method comprising the following steps:

[0039] a) Making positive and negative electrodes: First, make polytetrafluoroethylene (PVDF) into a solution with a mass fraction of 8% with N-methylpyrrolidone (NMP), then add a conductive agent, and disperse it at high speed for 2 hours. MaterialLiNi 0.33 co 0.33 mn 0.33 o 2 +LiNi 0.8 co 0.1 mn 0.1 o 2 Disperse in an organic solvent, stir evenly to obtain negative electrode slurry, disperse at high speed for 2 hours, add NMP to adjust the viscosity to 2000 mPa·s, and sieve the negative electrode slurry with a 100-mesh metal mesh after high-speed shear dispersion for 1 hour, Evenly coat the sieved negative electrode slurry on an aluminum foil with a thickness of 15 microns, dry it at 100°C, and roll the dried negative electrode sheet. The thickness of the negative electrode sheet after rolling is 200 μm, and the compacted density is 2.5g / cm 3 ; Co...

Embodiment 3

[0046] A manufacturing method of a lithium titanate battery, the manufacturing method comprising the following steps:

[0047] a) Making positive and negative electrodes: First, make polytetrafluoroethylene (PVDF) into a solution with a mass fraction of 8% with N-methylpyrrolidone (NMP), then add a conductive agent, and disperse it at high speed for 2 hours. MaterialLiNi 0.2 co 0.35 mn 0.45 o 2 +LiNi 0.4 co 0.3 mn 0.3 o 2 Disperse in an organic solvent, stir evenly to obtain negative electrode slurry, disperse at high speed for 2 hours, add NMP to adjust the viscosity to 3000 mPa s, and sieve the negative electrode slurry with a 110-mesh metal mesh after high-speed shear dispersion for 1 hour, The sieved negative electrode slurry is evenly coated on an aluminum foil with a thickness of 18 microns, dried at 140°C, and the dried negative electrode sheet is rolled. The thickness of the negative electrode sheet after rolling is 300 μm, and the compacted density is 3.3g / cm...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a lithium titanate battery, comprising a positive electrode sheet, a negative electrode sheet, a diaphragm, an electrolyte and an outer package, and the positive electrode sheet and the negative electrode sheet are respectively composed of positive and negative current collectors and coated on the positive and negative electrode current collectors Composed of positive and negative electrode materials, the negative electrode material includes a negative electrode active material, a negative electrode conductive agent and a negative electrode binder, and the negative electrode active material is an irregular ternary positive electrode material. Due to the use of irregular ternary materials in the negative electrode and the maximum charging potential of the negative electrode with high nickel content at 4.4V, the battery made of this material has a high specific capacity, greater than 180mAh / g, and has a high Stability; in the present invention, the energy density of the battery cell assembled with the high specific capacity negative electrode and the lithium titanate positive electrode can reach 90Wh / kg, which is significantly higher than the energy density of the existing lithium titanate battery.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to an irregular ternary-lithium titanate lithium ion battery with high energy density and a manufacturing method. Background technique [0002] At present, the anode materials of commercialized lithium-ion batteries are basically graphite-like carbon materials. Carbon materials have the advantages of high thermal stability, good electrical conductivity, fast intercalation and extraction of lithium ions, and high reversibility. than, lithium titanate (Li 4 Ti 5 o 12 ) has obvious advantages: 1) It is a near-zero-volume deintercalation lithium insertion material, which does not change its structure during charging and discharging, and has good cycle performance; 2) It has a good charging and discharging platform; 3) Theoretical specific capacity 175 mAh / g, the actual specific capacity can reach 160 mAh / g, and it is concentrated in the platform area; 4) It...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M4/485H01M4/505H01M4/525H01M10/0569H01M10/058
CPCH01M4/485H01M4/505H01M4/525H01M10/0525H01M10/0567H01M10/058Y02E60/10Y02P70/50
Inventor 赵亚刘旭马伟华颜雪冬
Owner NINGBO VEKEN BATTERY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com